Dip switch functions – Whelen ALPHA12S User Manual

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position, a steady, rise and fall tone is produced (“Wail”). A single

“tap” on the vehicle’s steering wheel horn button (if the vehicle’s

horn has been wired to the Alpha), changes the siren tone to a
“Yelp” pattern (a fast, rise and fall tone). A second “tap”, and the

siren returns to a “Wail” tone.

HF (Hands-Free Operation) - When the function switch is in the
Hands-Free position, the siren functions of the Alpha

are placed

in a stand-by mode. Siren tones are activated by a single “tap”
on the vehicle’s steering wheel horn button (if the vehicle’s horn

has been wired to the Alpha). The first tap produces a Wail tone

(a steady, rise and fall tone). A second tap produces a Yelp tone
(a fast, rise and fall tone). A third tap produces a Piercer™ tone

(an extremely fast, rise and fall tone). The next tap returns the

siren to a Wail tone and the cycle repeats itself. Two quick, suc-
cessive taps stop the siren.

Tone 2 (YELP) - When the function switch is in the Tone 2 posi-
tion, a fast, rise and fall tone is produced (Yelp). A single tap on

the vehicle’s steering wheel horn button (if the vehicle’s horn has
been wired to the Alpha), changes the siren tone to a Piercer

”

pattern (an extremely fast, rise and fall tone). With a second tap,

it will return to Yelp.

ALPHA

SIREN SPECIFICATIONS

INPUT VOLTAGE . . . . . . . . . . . . 13.5 VDC ± 20%
INPUT CURRENT (OFF) . . . . . . 0 mA
INPUT CURRENT (STANDBY) . 10 mA (TYP.)
INPUT CURRENT (SIREN). . . . . 8 Amps (TYP.)
OUTPUT VOLTAGE . . . . . . . . . . 34 V RMS (MAX.)
SPEAKER . . . . . . . . . . . . . . . . . . (1) 11 ohm
OUTPUT POWER @ 15 VDC. . . 105 WATTS (MAX.)
H/R VOLTAGE . . . . . . . . . . . . . . INPUT VOLTAGE or

GROUND

H/R CURRENT . . . . . . . . . . . . . . 15 mA (TYP.)
OPERATING TEMP. . . . . . . . . . . -30° C. to +60° C.
OPERATING HUMIDITY. . . . . . . 95% NON-CONDENSING

Dip Switch Functions:

Some of the default functions of the Alpha siren amplifier can be
customized (via dip switches) to suit the needs of the operator.
In the default factory configuration, each dip switch is in the
down (ON) position. The following section will explain dip switch
functionality in both the ON and OFF position:
Down= On (Closed) Up = Off (Open)
Dip Switch #1 Down = 3rd Tone is Active

Up =

3rd Tone is Off

Dip Switch #2 Down = 3rd Tone is Piercer™

Up =

3rd Tone is Hi/Low

Dip Switch #3 Down = Piercer Override for Yelp

Up =

Airhorn Override for Yelp

Dip Switch #4 Down = Wail has Normal Yelp Override

Up =

Wail has 10 second Yelp Override

Dip Switch #5 Down = Manual Stop

Up =

Manual Coast

Dip Switch #6 Down = Hands Free position is Hands-Free

Up =

Hands Free Position is Manual

Dip Switch #7 Down (With Switch 8 Down) =Tone 2 is Yelp

Down (With Switch 8 Up) =Tone 2 is Hi/Low

Dip Switch #8 Up (With Switch 7 Down) =Tone 2 is Hi/Low

Up (With Switch 7 Up) =Tone 2 is Manual

Connecting to your Horn Relay:

Route the WHITE and GREY wires along the factory wire

harness and through the firewall at the same point as the

RED and BLACK wires.

Locate your vehicle’s horn relay and route the WHITE and

GREY wires to this. If possible, follow the factory wire har-
ness to this relay.

Locate the wire that connects the vehicle horn to the horn
relay. Cut this wire.

Connect the WHITE wire to the wire coming from the horn
relay.

Connect the GREY wire to the wire coming from the horn.

Connecting to your Speaker (100 watt):

Route the ORANGE and BROWN wires along the factory
wiring harness towards your speaker.

Connect the ORANGE wire to the POSITIVE (+)
terminal on the speaker.

Connect the BROWN wire to the NEGATIVE (-)
terminal on the speaker.

The installation of your Alpha Series siren amplifier will be com-
plete after the fuse block wire is connected to the POSITIVE (+)

terminal of the battery. After this connection has been made,

visually inspect the fuses at the back of the amplifier and at the
battery. If either of these fuses is blown, carefully inspect all of

the circuit wires and make sure they are wired correctly.

Replace the blown fuses with ones of an identical amp rating
as the original. If these fuses blow after installation or activa-

tion, contact Whelen Engineering Technical Support.

Operating the Alpha

Series Siren Amplifier:

Power Switch - This switch has two positions:
Down (Alpha

- Off) and Up (Alpha

- On). When this switch is in

the Off position, the siren will not function. When the switch is in

the On position the siren is functional and may be activated at
the operator’s discretion.
NOTE: If the Alpha

is connected to the vehicle’s horn ring cir-

cuit, the vehicle horn is disabled when the Alpha

power switch

is in the ON position.

Airhorn Button - When the Airhorn button is pressed, a simu-
lated “air horn” siren tone will be generated by your vehicle’s

loudspeaker. This tone is continuous until the Airhorn button is

released.

Function Switch - The Function Switch controls the siren func-

tions of the Alpha. There are 3 positions that may be selected.
Each position and it’s function is outlined below:

Tone 1 (WAIL) - When the function switch is in the Tone 1

SERIES

ALPHA

TONE 2

HANDSFREE

POWER

FUNCTION

TONE 1

AIRHORN

SW1

SW2

SW3